Answers

2015-11-23T23:15:51+05:30
Power(P) = 1/Focal length(f) 

So, Power is the reciprocal of the focal length of the lens.

∴ you take the focal length to the other side

P = 1/f
f = 1/P

∴ the unit derived is in metres.

Hope I helped you! :)
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